3CX Advanced Certification Exam 2026/2027
Latest 3CX Academy Actual Exam Questions — 100 Q&A with
Verified Solutions
3CX Academy | Advanced Certified Engineer Certification Assessment
Core Domains: Phone System Architecture & Deployment • Network Infrastructure & Firewall
• SIP Trunking & VoIP Protocols • Security Hardening (TLS/SRTP) • Advanced Call Routing &
IVR • CRM & Third-Party Integration • Remote Extensions (STUN/TUNNEL) • High
Availability & Failover • Troubleshooting & Diagnostics • Maintenance & Backup
Exam Structure
The 3CX Advanced Certification Examination for the 2026/2027 certification cycle is
a 100-question, online assessment consisting of multiple-choice and scenario-based
items with a 2-hour time limit, administered through the 3CX Academy platform and
aligned with advanced 3CX Phone System competencies. Successful candidates earn
the 3CX Advanced Certified Engineer designation.
Certification 3CX Advanced Certified Engineer
Format Multiple-choice & scenario/applied-
configuration
Number of Questions 100 items
Time Limit 2 hours (120 minutes)
Platform 3CX Academy online
Introduction
This 3CX Advanced Certification Exam guide for the 2026/2027 update prepares
unified communications professionals on the advanced configuration, security, and
management of 3CX Phone System deployments. The content emphasizes network
infrastructure design, SIP protocol optimization, security hardening practices, and
troubleshooting methodologies aligned with 3CX Academy curriculum objectives,
VoIP industry best practices, and current system documentation, ensuring learners
can architect resilient communication solutions, implement enterprise-grade
security controls, and demonstrate the technical competency required for 3CX
Advanced Certified Engineer designation.
How to Use This Guide
Correct answers are shown in bold green and marked with a check (✓). Each
answer is followed by an italicized rationale citing the 3CX Advanced Certification
Study Guide, 3CX Knowledge Base, SIP RFC 3261, and VoIP security best practices.
The 100 questions are grouped into the ten core domains (ten questions each).
,Reference Diagrams
Figure 1. 3CX Phone System network topology — SIP trunk, firewall/NAT, PBX,
remote extensions, and endpoints with key ports.
Figure 2. 3CX deployment & configuration workflow — plan through maintenance.
,
, Examination Question Bank — Answers & Rationales
Domain 1 — 3CX Phone System Architecture & Deployment Models
Q1. Which underlying signaling protocol does 3CX Phone System use for
call control?
A. H.323
B. SIP (Session Initiation Protocol) ✓
C. MGCP
D. Skinny/SCCP
Correct Answer: B. SIP (Session Initiation Protocol)
Rationale: 3CX is a software-based, standards-compliant IP PBX built on the SIP
protocol (RFC 3261) for call setup, modification, and teardown, which is why it
interoperates with SIP trunks and SIP endpoints (3CX architecture; RFC 3261).
Q2. Which operating systems are officially supported for a self-managed
3CX installation?
A. Windows and Linux (Debian) ✓
B. macOS only
C. Windows only
D. Solaris and AIX
Correct Answer: A. Windows and Linux (Debian)
Rationale: 3CX can be self-hosted on Windows or on Debian Linux (the
recommended and default OS in current versions), or run as a hosted/cloud instance.
Debian is preferred for new deployments (3CX installation documentation).
Q3. What is the recommended public network requirement for a reliable
on-premise 3CX server handling remote extensions?
A. A dynamic IP with no DNS
B. A static public IP address with a matching FQDN ✓
C. IPv6 link-local only
D. A shared NAT IP with no port forwarding
Correct Answer: B. A static public IP address with a matching FQDN
Rationale: A static public IP plus a fully qualified domain name (FQDN) with a valid
TLS certificate ensures consistent reachability for remote extensions, apps, and
provisioning (3CX network requirements).
Q4. In 3CX terminology, what is a 'DID' (also called DDI)?
A. A hardware codec
B. A Direct Inward Dialing number that routes external calls to a specific
destination ✓
C. A backup file
D. A firewall rule
Latest 3CX Academy Actual Exam Questions — 100 Q&A with
Verified Solutions
3CX Academy | Advanced Certified Engineer Certification Assessment
Core Domains: Phone System Architecture & Deployment • Network Infrastructure & Firewall
• SIP Trunking & VoIP Protocols • Security Hardening (TLS/SRTP) • Advanced Call Routing &
IVR • CRM & Third-Party Integration • Remote Extensions (STUN/TUNNEL) • High
Availability & Failover • Troubleshooting & Diagnostics • Maintenance & Backup
Exam Structure
The 3CX Advanced Certification Examination for the 2026/2027 certification cycle is
a 100-question, online assessment consisting of multiple-choice and scenario-based
items with a 2-hour time limit, administered through the 3CX Academy platform and
aligned with advanced 3CX Phone System competencies. Successful candidates earn
the 3CX Advanced Certified Engineer designation.
Certification 3CX Advanced Certified Engineer
Format Multiple-choice & scenario/applied-
configuration
Number of Questions 100 items
Time Limit 2 hours (120 minutes)
Platform 3CX Academy online
Introduction
This 3CX Advanced Certification Exam guide for the 2026/2027 update prepares
unified communications professionals on the advanced configuration, security, and
management of 3CX Phone System deployments. The content emphasizes network
infrastructure design, SIP protocol optimization, security hardening practices, and
troubleshooting methodologies aligned with 3CX Academy curriculum objectives,
VoIP industry best practices, and current system documentation, ensuring learners
can architect resilient communication solutions, implement enterprise-grade
security controls, and demonstrate the technical competency required for 3CX
Advanced Certified Engineer designation.
How to Use This Guide
Correct answers are shown in bold green and marked with a check (✓). Each
answer is followed by an italicized rationale citing the 3CX Advanced Certification
Study Guide, 3CX Knowledge Base, SIP RFC 3261, and VoIP security best practices.
The 100 questions are grouped into the ten core domains (ten questions each).
,Reference Diagrams
Figure 1. 3CX Phone System network topology — SIP trunk, firewall/NAT, PBX,
remote extensions, and endpoints with key ports.
Figure 2. 3CX deployment & configuration workflow — plan through maintenance.
,
, Examination Question Bank — Answers & Rationales
Domain 1 — 3CX Phone System Architecture & Deployment Models
Q1. Which underlying signaling protocol does 3CX Phone System use for
call control?
A. H.323
B. SIP (Session Initiation Protocol) ✓
C. MGCP
D. Skinny/SCCP
Correct Answer: B. SIP (Session Initiation Protocol)
Rationale: 3CX is a software-based, standards-compliant IP PBX built on the SIP
protocol (RFC 3261) for call setup, modification, and teardown, which is why it
interoperates with SIP trunks and SIP endpoints (3CX architecture; RFC 3261).
Q2. Which operating systems are officially supported for a self-managed
3CX installation?
A. Windows and Linux (Debian) ✓
B. macOS only
C. Windows only
D. Solaris and AIX
Correct Answer: A. Windows and Linux (Debian)
Rationale: 3CX can be self-hosted on Windows or on Debian Linux (the
recommended and default OS in current versions), or run as a hosted/cloud instance.
Debian is preferred for new deployments (3CX installation documentation).
Q3. What is the recommended public network requirement for a reliable
on-premise 3CX server handling remote extensions?
A. A dynamic IP with no DNS
B. A static public IP address with a matching FQDN ✓
C. IPv6 link-local only
D. A shared NAT IP with no port forwarding
Correct Answer: B. A static public IP address with a matching FQDN
Rationale: A static public IP plus a fully qualified domain name (FQDN) with a valid
TLS certificate ensures consistent reachability for remote extensions, apps, and
provisioning (3CX network requirements).
Q4. In 3CX terminology, what is a 'DID' (also called DDI)?
A. A hardware codec
B. A Direct Inward Dialing number that routes external calls to a specific
destination ✓
C. A backup file
D. A firewall rule
